Install
Once the archive is expanded on the local machine, run the included script (amdgpu-pro-install) to install the graphics stack. During the installation you will be required to provide sudo access, and also to provide two confirmations to:

Install the packages, and
Allow installation of "unverified" packages from the AMDGPU-PRO archive.

The script will use the package manager to install the components of the graphics stack, with a short delay during the DKMS (Dynamic Kernel Module Support) installation. From the directory where you extracted the archive, issue the following command:

(Notes: Please replace the "NNNNNN" in the following command line with the actual build number of the downloaded file.)